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Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, up, up, up, up, up.
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%I #10 Aug 08 2018 22:19:04

%S 1,1,20,1680,369600,168168000,137225088000,182499151015439,

%T 369333660414653745,1080107104118231632500,4384231121059173932562000,

%U 23913914175434871142808715000,170693577054027116430454774306800,1559452501977701854639515593122328400

%N Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, up, up, up, up, up.

%H Mingjia Yang, Doron Zeilberger, <a href="https://arxiv.org/abs/1805.06077">Increasing Consecutive Patterns in Words</a>, arXiv:1805.06077 [math.CO], 2018.

%Y Cf. A014606.

%K nonn

%O 0,3

%A _R. H. Hardin_, May 10 2010

%E a(10)-a(13) from _Alois P. Heinz_, Aug 08 2018